Savory Sautéed Broccoli Beef

Ingredients

• 1 cup beef stock
• 0.75 lb. flank steak, thinly sliced
• 1 inch piece of fresh ginger, minced
• 1/2 teaspoon black pepper
• 4 teaspoons soy sauce
• 2 tablespoons cornstarch
• 2 teaspoons oyster sauce
• 2 teaspoons rice vinegar
• 1 medium onion, thinly sliced
• 2 tablespoons canola oil
• 2 cups broccoli florets
• 3 garlic cloves, minced